CAJ | 학술논문

合理的侧斜分布可以使螺旋桨各半径剖面不同时进入船艉非均匀流场的高伴流区域，可有效降低螺旋桨在船艉非均匀流场运转所引发的振动噪声。文章利用基于螺旋桨面元法的非定常水动力性能预报工具配合智能寻优算法，对螺旋桨侧斜分布问题进行迭代优化设计。侧斜分布曲线采用B样条曲线表达，可保证曲线在优化过程中的光顺性；应用改进粒子群算法，结合螺旋桨非定常水动力性能预报工具，以降低轴向非定常力幅值为目标对侧斜分布进行了优化及相关的分析探讨；编制了基于OpenMP语言的并行优化算法以在多核高性能计算机上提高运算效率。数值优化结果表明，采用文中方法优化侧斜分布，可降低螺旋桨的非定常力幅值，该文的侧斜优化方法是可行、有效的，并行算法的引入可明显提高优化效率。
합리적측사분포가이사라선장각반경부면불동시진입선미비균균류장적고반류구역，가유효강저라선장재선미비균균류장운전소인발적진동조성。문장이용기우라선장면원법적비정상수동력성능예보공구배합지능심우산법，대라선장측사분포문제진행질대우화설계。측사분포곡선채용B양조곡선표체，가보증곡선재우화과정중적광순성；응용개진입자군산법，결합라선장비정상수동력성능예보공구，이강저축향비정상력폭치위목표대측사분포진행료우화급상관적분석탐토；편제료기우OpenMP어언적병행우화산법이재다핵고성능계산궤상제고운산효솔。수치우화결과표명，채용문중방법우화측사분포，가강저라선장적비정상력폭치，해문적측사우화방법시가행、유효적，병행산법적인입가명현제고우화효솔。
Better skew distribution is benefit for propeller blade sections to access the nonuniform ship wake nonsynchronously, so the vibration and noise induced by propeller operating in the ship wake can be de-creased. In this paper, an artificial intelligence optimization algorithm and a prediction method of unsteady hydrodynamic characteristics of propeller based on the surface panel method are provided to optimize the propeller skew distribution. The propeller skew distribution curve is described by B-spline, and the curve fairing is ensured;Aiming at reducing unsteady axial forces, an improved particle swarm optimization combined with the prediction method of propeller unsteady hydrodynamic performance is utilized to optimize and analyze propeller skew distribution. The parallel optimization algorithm based on OpenMP is also developed for multi-cup computers in order to improve the computation efficiency. Numerical optimization results show that the propeller skew optimization method provided in this paper can reduce propeller unsteady thrust amplitude, the method is effective, reliable and practical, and the parallel computing can improve the optimizing efficiency greatly.